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Finding the Fourth Proportional to 183.56, 253.31 and 100.66

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Solution

The fourth proportional to 183.56, 253.31 and 100.66 is: 138.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.56 : 253.31 = 100.66 : x
  2. Step 2: Convert to fraction form
    183.56/253.31 = 100.66/x
  3. Step 3: Cross multiply
    183.56x = 253.31 × 100.66
  4. Step 4: Simplify right side
    183.56x = 25,498.38
  5. Step 5: Solve for x
    x = 25,498.38/183.56
  6. Step 6: Final answer
    x = 138.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.